if(isset($_POST['gonder'])){
$curl = curl_init(); curl_setopt_array($curl, array(CURLOPT_URL => "site",CURLOPT_RETURNTRANSFER => true,CURLOPT_ENCODING => "",CURLOPT_MAXREDIRS => 10,CURLOPT_TIMEOUT => 0,CURLOPT_FOLLOWLOCATION => true,CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,CURLOPT_CUSTOMREQUEST => "POST",CURLOPT_POSTFIELDS => "{nt"signal": "restart"n}",CURLOPT_HTTPHEADER => array(    'Accept: application/json',    'Content-Type: application/json',    "Authorization: Bearer api key"  ), )); $response = curl_exec($curl);$err = curl_error($curl); curl_close($curl); if ($err) {  echo "cURL Error #:" . $err;} else {  echo $response;}}

<form action="" method="post">
<button type="submit" name="gonder">CURL ÇALIŞTIR</button>
</form>